If the difference between a number and $\frac{3}{5}$ of the same number is $30$,then find the number.

The numerator of a fraction is the product of two numbers. One of the numbers is greater than the other by $2$. The greater number is smaller than the denominator $D = 7+c$ (where $c > -7$ is a constant). If the fraction is $f(x) = \frac{(x-2)x}{x+k}$ (where $x$ is the greater number),find the minimum value of the fraction.

$323.232 + 32.3232 + 3.23232 = ?$

In a college,$\frac{1}{5}$ of the girls and $\frac{1}{8}$ of the boys took part in a social camp. The fraction of the total students in the college who took part in the camp is:

$\sqrt{2601} - \sqrt{1156} + \sqrt{484} = ?$

For what value of $M$,is $34M$ divisible by $12$?